what is defects

In a blub factory, 1000 bulbs were checked. Out of which 50 were found to be defective. What is the experimental probability a blub is defective? => 6% or 5% or 15% or 2%..

It has been found that 6% of the tools produced by a certain machine are defective. What is the probability that in a shipment of 500 such tools 4% or less will prove defective? => 97.13% or 0.97% or 2.87% or 47.13%..

Stoichiometric Defects - If imperfections in the crystal are such that the ratio between the anions and cations remain same as represented by the molecular formula, the defect is called a stoichiometric defect. There are three types of stoichiometric defects:..

If an ion is missing from its lattice site (causing a vacancy or a hole there) and it occupies the interstitial site so that electrical neutrality as well as stoichiometry of the compound are maintained. This type of defect is called Frenkel defect. Since the size of cations ar..

In in ionic crystal of the type A + B - , equal number of anions and cations are missing from the lattice sites so that electrical neutrality is maintained it is called schottky defect. fig 2.29 - Schottky defect..

Defects of Vision - A normal eye can see all objects over a wide range of distances i.e., from 25 cm to infinity. But due to certain abnormalities the eye is not able see objects over such a wide range of distances and such an eye is said to be defective. Some of the defect..

A normal eye can see all objects over a wide range of distances i.e., from 25 cm to infinity. But due to certain abnormalities the eye is not able see objects over such a wide range of distances and such an eye is said to be defective. Some of the defects of vision are Hyperm..

Defects in Crystals - According to third law of thermodynamic it is only at OK that true crystals passes perfect order of arrangement of atoms in pure crystals. But with rise in temperature some derivations from complete order takes place. Presence of impurities also adds to disorder. "An..

According to third law of thermodynamic it is only at OK that true crystals passes perfect order of arrangement of atoms in pure crystals. But with rise in temperature some derivations from complete order takes place. Presence of impurities also adds to disorde..

A box has six bulbs, two of which are defective. If two are selected at random without replacement, then what is the probability that both are defective? => 8 15 or 1 9 or 1 3 or 1 15..